13问答网 > 1.当x____时,分式x+3⼀x-2有意义计算：1.y⼀x+y-x⼀x-y 2.x-2⼀x-5-2x-1⼀（x-2）+1

1.当x____时,分式x+3⼀x-2有意义计算：1.y⼀x+y-x⼀x-y 2.x-2⼀x-5-2x-1⼀（x-2）+1

2025-04-28 10:18:34

推荐回答（1个）

回答1：

1.当x_≠2___时,分式x+3/x-2有意义

计算：1.y/x+y-x/x-y
=y(x-y)/(x+y)(x-y)-x(x+y)/(x+y)(x-y)
=(xy-y²-x²-xy)/(x²-y²)
=(x²+y²)/(y²-x²)

2.x-2/x-5-2x-1/（x-2）+1
=[(x-2)²-(2x-1)(x-5)+(x-2)(x-5)]/(x-2)(x-5)
=(x²-4x+4-2x²+11x-5+x²-7x+10)/(x-2)(x-5)
=14/(x-2)(x-5)
=14/(x²-7x+10)

1.当x____时,分式x+3⼀x-2有意义 计算：1.y⼀x+y-x⼀x-y 2.x-2⼀x-5-2x-1⼀（x-2）+1

1.当x____时,分式x+3⼀x-2有意义计算：1.y⼀x+y-x⼀x-y 2.x-2⼀x-5-2x-1⼀（x-2）+1